Artemether-Lumefantrine medication is becoming less effective in treating simple cases of malaria in many places where the disease is prevalent. Worldwide, plasmodium falciparum and plasmodium vivax parasite tolerance, recrudescence, and resistance are on the rise. Our objective was to assess the rate of Artemether-Lumefantrine (Coartem) treatment failure in persons presenting with uncomplicated malaria at health facilities. From April 1, 2022, to June 30, 2022, 166 patients with positive malaria test results attended health facilities as part of this descriptive cross-sectional research. A total of 9.6% of malaria patients did not show improvement after receiving corticosteroids; 6.0% had plasmodium falciparum, 2.4% plasmodium vivax, and 1.2 had a mixed infection. Among those who did not take the medication with the fatty meal, 31% tested positive for malaria after two weeks of receiving coartem. Additionally, 25% of those who did not follow the treatmentschedule had not eradicated the parasite, even thoughthey received coartem. Nearly a third of patients were given Coartem without going through malaria testing, according to the data. In adults in Khartoum state, Sudan, the effectiveness of Artemether-Lumefantrine for treating uncomplicated malaria is declining. To determine how often treatments fail and what variables contribute to drugs having less of an effect, prospective trials are required. Pharmacists should not provide antimalarial medication without a doctor's order and a positive blood test for malaria.